{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\toprule
                    &\multicolumn{2}{c}{\shortstack{Attriters assigned to \\ the 25th percentile}}&\multicolumn{2}{c}{\shortstack{Attriters assigned to \\ the 10th percentile}}\\\cmidrule(lr){2-3}\cmidrule(lr){4-5}
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{\shortstack{Affective \\ polarization}}&\multicolumn{1}{c}{\shortstack{Affective \\ polarization (out- \\ party animus only)}}&\multicolumn{1}{c}{\shortstack{Affective \\ polarization}}&\multicolumn{1}{c}{\shortstack{Affective \\ polarization (out- \\ party animus only)}}\\
\midrule
SBD                 &      -0.107         &      -0.107         &      -0.198\sym{*}  &      -0.168         \\
                    &     [0.109]         &     [0.110]         &     [0.112]         &     [0.112]         \\
\addlinespace
DW                  &      -0.162         &      -0.217\sym{*}  &      -0.163         &      -0.214\sym{*}  \\
                    &     [0.115]         &     [0.116]         &     [0.118]         &     [0.118]         \\
\addlinespace
Republicans         &      -0.562\sym{***}&      -0.520\sym{***}&      -0.539\sym{***}&      -0.579\sym{***}\\
                    &     [0.114]         &     [0.117]         &     [0.119]         &     [0.118]         \\
\addlinespace
Independents        &      -0.789\sym{***}&      -0.611\sym{***}&      -0.795\sym{***}&      -0.692\sym{***}\\
                    &     [0.158]         &     [0.160]         &     [0.166]         &     [0.160]         \\
\addlinespace
Recruited from BA listserv&      -0.116         &      -0.241\sym{**} &      -0.110         &      -0.273\sym{**} \\
                    &     [0.104]         &     [0.105]         &     [0.107]         &     [0.108]         \\
\addlinespace
Constant            &       0.343\sym{***}&       0.424\sym{***}&       0.335\sym{***}&       0.467\sym{***}\\
                    &     [0.116]         &     [0.118]         &     [0.120]         &     [0.120]         \\
\midrule
Observations        &         453         &         453         &         453         &         453         \\
\bottomrule
\end{tabular}
}
